Social Anxiety and Romantic Relationships?

Lately (over the past few months) my shyness and anxiety have really started to interfere in my relationship with my boyfriend. We've been together for four years and this is our first year going to the same university together. Don't get me wrong, our relationship is great, but I'm afraid that my issues are going to create problems where there aren't any...
Lately I'm afraid to initiate conversations with him or make any plans with him because I feel as though I'm bothering him or that if he wanted to see me/talk to me, he would call me first. When we do talk and hang out, I find myself hyper-analyzing everything that he says and does over and over again until it seems like I've screwed up somehow at every turn. No matter how happy I am in the moment I can never make it last because I overthink everything to the extreme. When we have fun together I feel extremely happy and good about myself, but if we don't talk for a couple of days the doubt sinks in again.
I worry that he doesn't find me attractive, that he's tired of me, that I bore him, that he thinks I'm strange, that he'd rather spend time with anyone else besides me... The list goes on and on.
The worst part is that confidence is what guys find really attractive and I have NONE. Please tell me I'm not the only one that feels this way. The last thing I want is to lose him over my own issues, so any help/advice is greatly appreciated

I feel for you. He must see something he likes if it's been 4 years. Not sure how to help with this one, my husband is like the only person in the world that I don't worry about. Now that I think about it, I did at first though. It will get better, especially if you make a step toward a bigger commitment together. I wonder what could improve your confidence? If you figure anything out, let me know! I need some too!

Worrying about someone losing interest is something that happens to a lot of couples. Just tell him how you feel and if he's a decent guy he'll listen and you can work it out together.